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http://socratic.org/chemistry. We'll look at what happens when you dissolve ionic and covalent compounds in water. Ionic compounds break apart into the ions that make them up, a process called dissociation, while covalent compounds only break into the molecules, not the individual atoms.ttp://socratic.org/chemistry. We'll look at what happens when you dissolve ionic and covalent compounds in water. Ionic compounds break apart into the ions that make them up, a process called dissociation, while covalent compounds only break into the molecules, not the individual atoms.
The solubilities of ionic compounds are affected by solute-solvent interactions, the common ion effect, and temperature. Strong solute-solvent attractions increase solubility of ionic compounds. Ionic compounds are most soluble in polar solvents like water, because the ions of the solid are strongly attracted to the polar solvent molecules. COMMON-ION EFFECT. Ionic compounds are less soluble is solvents that contain a common ion. For example, CaSOâ is slightly soluble in water. CaSOâ(s) â CaÂ²âº(aq) + SOâÂ²â»(aq) If the water already contains calcium ions or sulfate ions, the position of equilibrium moves to the left and the solubility decreases (Le ChÃ¢telierâs Principle).